US20220088849A1 - Stacked workpiece - Google Patents

Stacked workpiece Download PDF

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Publication number
US20220088849A1
US20220088849A1 US17/424,421 US201917424421A US2022088849A1 US 20220088849 A1 US20220088849 A1 US 20220088849A1 US 201917424421 A US201917424421 A US 201917424421A US 2022088849 A1 US2022088849 A1 US 2022088849A1
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US
United States
Prior art keywords
workpiece
sheet material
mold
stacked
side protruding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US17/424,421
Inventor
Akira Taguchi
Hiroaki Iwanishi
Michinobu Sato
Hikaru Kurokawa
Takashi Iino
Yusuke Kato
Takashi Abe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
Original Assignee
Honda Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Assigned to HONDA MOTOR CO., LTD. reassignment HONDA MOTOR CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KUROKAWA, Hikaru, KATO, YUSUKE, IINO, TAKASHI, ABE, TAKASHI, SATO, Michinobu, TAGUCHI, AKIRA, IWANISHI, Hiroaki
Publication of US20220088849A1 publication Critical patent/US20220088849A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/10—Forming by pressure difference, e.g. vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • B29C65/7847—Holding or clamping means for handling purposes using vacuum to hold at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • B29C66/82423—Pneumatic or hydraulic drives using vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/04—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/08—Deep drawing or matched-mould forming, i.e. using mechanical means only
    • B29C51/082—Deep drawing or matched-mould forming, i.e. using mechanical means only by shaping between complementary mould parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/12—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor of articles having inserts or reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/16—Lining or labelling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/30—Moulds
    • B29C51/36—Moulds specially adapted for vacuum forming, Manufacture thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/44—Removing or ejecting moulded articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3055—Cars

Definitions

  • the present invention relates to a stacked workpiece in which a sheet material is stacked on a workpiece body.
  • a stacked workpiece molding device that molds a stacked workpiece, which includes a workpiece body and a sheet material stacked on the workpiece body, by using a first mold that sucks and holds the workpiece body has been known (see, for example, Japanese Patent Application Laid-Open No. 7-24909).
  • Patent Literature 1 a clearance recess portion formed in a central portion of a workpiece body is closed by a shutter in order to prevent a sheet material from being pulled into and broken by the clearance recess portion.
  • Patent Literature 1 Japanese Patent Application Laid-Open No. 7-24909
  • Patent Literature 2 Japanese Patent Application Laid-Open No. 2000-218688
  • Patent Literature 1 it is not possible to provide a suction device that is placed in a clearance recess portion in a central portion of the workpiece body and that sucks the sheet material in a direction away from the workpiece body.
  • a suction device that is placed in a clearance recess portion in a central portion of the workpiece body and that sucks the sheet material in a direction away from the workpiece body.
  • the sheet material is required to be firmly attached to the workpiece body.
  • An object of the present invention is to provide a stacked workpiece in which a sheet material can be more firmly attached to a workpiece body than in the related art.
  • the compression portion is formed in at least a part of the peripheral portion of the sheet material by a workpiece-side protruding portion, the sheet material can be more firmly attached to the workpiece body than in the related art.
  • a workpiece-side protruding portion that protrudes toward a side of the sheet material and that forms the compression portion is provided in the workpiece body, and a protrusion amount of the workpiece-side protruding portion is set to be smaller than a thickness of the sheet material. According to such a configuration, since the protrusion amount of the workpiece-side protruding portion is set to be smaller than the wall thickness of the sheet material, the workpiece-side protruding portion is hidden by the sheet material. Thus, it is possible to prevent a rise of the sheet material due to the workpiece-side protruding portion and to improve appearance.
  • FIG. 1 is a view for schematically describing a stacked workpiece of an embodiment of the present invention.
  • FIG. 2 is a view for describing a first mold and a workpiece body of the present embodiment.
  • FIG. 3 is a view for describing a through hole of the present embodiment in an enlarged manner.
  • FIG. 4 is a view for describing suction force in a bonding process of the present embodiment.
  • FIG. 5 is a view for describing a workpiece-side protruding portion and a compression portion of the present embodiment.
  • FIG. 6 is a view for schematically describing a shutter device as a comparative example.
  • FIG. 7 is a view for schematically describing a stacked workpiece of another embodiment of the present invention.
  • a stacked workpiece molding device 1 of the present embodiment includes a first mold 20 and a second mold 30 .
  • a stacked workpiece 40 such as an instrument panel molded by the stacked workpiece molding device 1 includes a workpiece body 42 , and a sheet material 44 stacked on the workpiece body 42 .
  • the stacked workpiece molding device 1 includes a plurality of clamps 2 that grips a periphery of the sheet material 44 .
  • FIG. 2 A state in which the workpiece body 42 is placed on the first mold 20 is illustrated in FIG. 2 .
  • a plurality of suction holes 22 opened to a placement surface on which the workpiece body 42 is placed is provided in the first mold 20 .
  • a pattern which is formed of a recess/protrusion such as an embossment or matt finished surface and which is to be transferred to a surface of the sheet material 44 is formed.
  • a plurality of through holes 32 penetrating in such a manner as to be opened to a position of a periphery of the workpiece body 42 when the second mold 30 is overlapped with the first mold 20 with the workpiece body 42 and the sheet material 44 interposed therebetween is provided in the second mold 30 .
  • a plate 71 is provided in such a manner as to cover an opening of a recessed portion 36 formed in the inner surface of the second mold 30 , and the through holes 32 of the present embodiment are holes drilled in this plate 71 .
  • the through holes 32 are not limited to the holes in the plate 71 , and through holes may be pores included in a porous member embedded in the recessed portion 36 , for example.
  • a plurality of ejection holes 34 penetrating in such a manner as to be opened to a position of a central portion of the workpiece body 42 which portion is at portion excluding the periphery of the workpiece body 42 is provided in the second mold 30 .
  • a first suction device 51 to suck the sheet material 44 is connected to the through holes 32 via a first connection pipe 51 a.
  • a second suction device 52 to suck the workpiece body 42 is connected to the suction holes 22 via a second connection pipe 52 a .
  • a gas supply device 53 that supplies gas such us air is connected to the ejection holes 34 via a third connection pipe 53 a.
  • a bypass 53 b is connected to the first connection pipe 51 a and the third connection pipe 53 a. Allow channel switching valve 54 is provided in a connection portion between the third connection pipe 53 a and the bypass 53 b.
  • the flow channel switching valve 54 is configured to be switchable between two states that are an “ejection-enabled state” in which the gas supply device 53 is connected to the ejection holes 34 via the third connection pipe 53 a and connection between the ejection holes 34 and the first suction device 51 via the bypass 53 b is disconnected, and a “suction-enabled state” in which the first suction device 51 is connected to the ejection holes 34 via the third connection pipe 53 a, the bypass 53 b, and the first connection pipe 51 a and connection between the ejection holes 34 and the gas supply device 53 is disconnected.
  • a mold side protruding portion 20 a and a workpiece-side protruding portion 42 a protruding toward the second mold 30 are respectively provided in such a manner as to surround the plurality of through holes 32 and to extend along an outer edge of a bonded region of the sheet material 44 .
  • the mold-side protruding portion 20 a and the workpiece-side protruding portion 42 a are provided in such a manner as to surround the through holes 32 in the present embodiment, whereby it is possible to suppress or prevent the gas supplied from the gas supply device 53 to the surface of the sheet material 44 from flowing to the through holes 32 , and to suppress or prevent deterioration in the sucking performance of the first suction device 51 with respect to the sheet material 44 .
  • a mold-side protruding portion may be provided in the second mold 30 .
  • the stacked workpiece molding device 1 includes a control unit 61 that controls the first suction device 51 , the second suction device 52 , the gas supply device 53 , and the flow channel switching valve 54 .
  • the control unit 61 is an electronic control unit including a CPU, a memory, and the like, and controls the first suction device 51 , the second suction device 52 , the gas supply device 53 , and the flow channel switching valve 54 by executing a control program held in a storage unit such as a memory by the CPU and transmitting an instruction signal.
  • the first mold 20 and the second mold 30 are brought into an opened state, and the workpiece body 42 is placed on the first mold 20 . Then, the sheet material 44 gripped by the clamps 2 is arranged between the workpiece body 42 and the second mold 30 . Then, the first mold 20 and the second mold 30 are brought closer to each other and brought into a closed state.
  • the control unit 61 switches the flow channel switching valve 54 to the “suction-enabled state” (state in which the first suction device 51 is connected to the ejection holes 34 via the third connection pipe 53 a, the bypass 53 b, and the first connection pipe 51 a and the connection between the ejection holes 34 and the gas supply device 53 is disconnected), sucks the sheet material 44 with the first suction device 51 via the through holes 32 and the ejection holes 34 , and causes the sheet material to be attached to the inner surface of the second mold 30 .
  • the pattern formed in the inner surface of the second mold 30 can be transferred to a surface of the sheet material 44 (transfer process).
  • the sheet material 44 is not bonded to the entire surface of the workpiece body 42 , but is bonded only to a portion exposed in assembly of an automobile or the like and is not bonded to a portion such as a periphery hidden by another component in the assembly in order to prevent assembly failure. Only the bonded portion is left and cut, and the non-bonded portion is discarded.
  • the control unit 61 switches the flow channel switching valve 54 to the “ejection-enabled state” (state in which the gas supply device 53 is connected to the ejection holes 34 via the third connection pipe 53 a and the connection between the ejection holes 34 and the first suction device 51 via the bypass 53 b is disconnected), and supplies gas between the sheet material 44 and the second mold 30 by the gas supply device 53 via the ejection holes 34 in such a manner that the sheet material 44 is peeled off from the second mold 30 .
  • the control unit 61 sticks a portion of the sheet material 44 , which portion is not bonded to the work piece body 42 , to the second mold 30 via the through holes 32 .
  • control unit 61 sets suction force of the first suction device 51 and the second suction device 52 in such a manner that the suction force to suck the sheet material 44 from the through holes 32 becomes stronger than the suction force to suck the workpiece body 42 from the suction holes 22 as indicated by a non-bonded region X in FIG. 4 .
  • the suction force is set in such a manner, the sheet material 44 in the non-bonded portion can be appropriately attracted to the second mold 30 .
  • the mold side protruding pardon 20 a and the workpiece-side protruding portion 42 a are provided in such a manner as to surround the through holes 32 in the present embodiment, whereby it is possible to suppress or prevent the gas supplied from the gas supply device 53 to the surface of the sheet material 44 from flowing to the through holes 32 , and to suppress or prevent deterioration in the sucking performance of the first suction device 51 with respect to the sheet material 44 .
  • a mold-side protruding portion may be provided in the second mold 30 .
  • a space between the workpiece-side protruding portion 42 a and the second mold 30 becomes narrow due to the workpiece-side protruding portion 42 a, and a compression portion 44 a sandwiched and thinly crushed between the workpiece-side protruding portion 42 a and the second mold 30 is formed in at least a part of the peripheral portion of the sheet material 44 (portion where the workpiece-side protruding portion 42 a is provided).
  • the sheet material 44 can be more firmly attached to the workpiece body 42 than in the related art.
  • the workpiece-side protruding portion 42 a provided only in a part of the peripheral portion of the workpiece body 42 has been described.
  • a workpiece-side protruding portion of the present invention may be provided in an entire peripheral portion of a workpiece body.
  • a protrusion amount of the workpiece-side protruding portion 42 a is set to be smaller than a wall thickness of the sheet material 44 .
  • the workpiece-side protruding portion 42 a is hidden by the sheet material 44 and the surface of the sheet material 44 can be prevent from being raised by the workpiece-side protruding portion 42 a.
  • appearance of the stacked workpiece 40 can be improved.
  • a stacked workpiece of the present invention is not limited to this, and it is only necessary that a workpiece-side protruding portion and a compression portion are formed. Even when a protrusion amount of a workpiece-side protruding portion is set to be larger than a wall thickness of a sheet material, an effect of the present invention that “a sheet material 44 can be firmly attached to a workpiece body 42 ” can be acquired by a compression portion.
  • a compression portion of the present invention can be formed when a gap between a compression forming portion 42 b of a workpiece body 42 and a second mold 30 is set to be smaller than a thickness of a sheet material 44 according to a place where a compression portion of the sheet material 44 is to be formed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Laminated Bodies (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

A stacked workpiece in which a sheet material can be more firmly attached to a workpiece body than in the related art is provided.
A stacked workpiece (40) includes a workpiece body (42), and a sheet material (44) stacked on the workpiece body (42). In the workpiece body (42), a workpiece-side protruding portion (42 a) that is placed at least in a part of a peripheral portion of the stacked sheet material (44) and that protrudes toward a side of the sheet material (44) is provided, and a thinly-crushed compression portion (44 a) is formed in a portion of the sheet material (44) stacked on the workpiece-side protruding portion (42 a).

Description

    TECHNICAL FIELD
  • The present invention relates to a stacked workpiece in which a sheet material is stacked on a workpiece body.
    • BACKGROUND ART
  • Conventionally, a stacked workpiece molding device that molds a stacked workpiece, which includes a workpiece body and a sheet material stacked on the workpiece body, by using a first mold that sucks and holds the workpiece body has been known (see, for example, Japanese Patent Application Laid-Open No. 7-24909).
  • In Patent Literature 1, a clearance recess portion formed in a central portion of a workpiece body is closed by a shutter in order to prevent a sheet material from being pulled into and broken by the clearance recess portion.
  • Also, since a degree of freedom in layout of a workpiece body is limited when a shutter that covers a clearance recess portion is provided, what is provided with a suction device that is placed in a clearance recess portion formed in a central portion of a workpiece body and that sucks a sheet material in a direction away from the workpiece body has been also known (see, for example, Japanese Patent Application Laid-Open No. 2000-218688).
    • CITATION LIST Patent Literature
  • Patent Literature 1: Japanese Patent Application Laid-Open No. 7-24909
  • Patent Literature 2: Japanese Patent Application Laid-Open No. 2000-218688
    • SUMMARY OF INVENTION Technical Problem
  • In a stacked workpiece molding device of Patent Literature 1, in a case where a second mold having, on an inner surface, a pattern that can be transferred to a surface of a sheet material is used, it is conceivable that fluid such as air is ejected from the second mold in such a manner as to make it easier for the sheet material to peel off from the second mold when a first mold that sucks a workpiece body and the second mold are made to overlap with each other kind the sheet material is attached to the workpiece body after the sheet material is sucked by the second mold and the pattern is transferred thereto.
  • In this case, unlike Patent Literature 1, it is not possible to provide a suction device that is placed in a clearance recess portion in a central portion of the workpiece body and that sucks the sheet material in a direction away from the workpiece body. Thus, in order to improve a degree of freedom in layout of the workpiece body, it is conceivable to arrange nesting in the clearance recess portion.
  • Then, the sheet material is required to be firmly attached to the workpiece body.
  • An object of the present invention is to provide a stacked workpiece in which a sheet material can be more firmly attached to a workpiece body than in the related art.
    • Solution to Problem
  • In order to achieve the above object, the present invention is
      • a stacked workpiece including
      • a workpiece body, and
      • a sheet material stacked on the workpiece body, wherein
      • a compression portion crushed in a thickness direction is formed in at least a part of a peripheral portion of the sheet material.
  • According to the present invention, since the compression portion is formed in at least a part of the peripheral portion of the sheet material by a workpiece-side protruding portion, the sheet material can be more firmly attached to the workpiece body than in the related art.
  • Also, it is preferable in the present invention that a workpiece-side protruding portion that protrudes toward a side of the sheet material and that forms the compression portion is provided in the workpiece body, and a protrusion amount of the workpiece-side protruding portion is set to be smaller than a thickness of the sheet material. According to such a configuration, since the protrusion amount of the workpiece-side protruding portion is set to be smaller than the wall thickness of the sheet material, the workpiece-side protruding portion is hidden by the sheet material. Thus, it is possible to prevent a rise of the sheet material due to the workpiece-side protruding portion and to improve appearance.
    • BRIEF DESCRIPTION OF DRAWINGS
  • FIG. 1 is a view for schematically describing a stacked workpiece of an embodiment of the present invention.
  • FIG. 2 is a view for describing a first mold and a workpiece body of the present embodiment.
  • FIG. 3 is a view for describing a through hole of the present embodiment in an enlarged manner.
  • FIG. 4 is a view for describing suction force in a bonding process of the present embodiment.
  • FIG. 5 is a view for describing a workpiece-side protruding portion and a compression portion of the present embodiment.
  • FIG. 6 is a view for schematically describing a shutter device as a comparative example.
  • FIG. 7 is a view for schematically describing a stacked workpiece of another embodiment of the present invention.
    •  DESCRIPTION OF EMBODIMENTS
  • An embodiment of a stacked workpiece and a stacked workpiece molding device of the present invention will be described with reference to the drawings. Referring to FIG. 1, a stacked workpiece molding device 1 of the present embodiment includes a first mold 20 and a second mold 30. A stacked workpiece 40 such as an instrument panel molded by the stacked workpiece molding device 1 includes a workpiece body 42, and a sheet material 44 stacked on the workpiece body 42.
  • The stacked workpiece molding device 1 includes a plurality of clamps 2 that grips a periphery of the sheet material 44.
  • A state in which the workpiece body 42 is placed on the first mold 20 is illustrated in FIG. 2.
  • As illustrated in FIG. 3, a plurality of suction holes 22 opened to a placement surface on which the workpiece body 42 is placed is provided in the first mold 20. In the inner surface of the second mold 30, a pattern which is formed of a recess/protrusion such as an embossment or matt finished surface and which is to be transferred to a surface of the sheet material 44 is formed.
  • A plurality of through holes 32 penetrating in such a manner as to be opened to a position of a periphery of the workpiece body 42 when the second mold 30 is overlapped with the first mold 20 with the workpiece body 42 and the sheet material 44 interposed therebetween is provided in the second mold 30. A plate 71 is provided in such a manner as to cover an opening of a recessed portion 36 formed in the inner surface of the second mold 30, and the through holes 32 of the present embodiment are holes drilled in this plate 71. Note that the through holes 32 are not limited to the holes in the plate 71, and through holes may be pores included in a porous member embedded in the recessed portion 36, for example.
  • Also, a plurality of ejection holes 34 penetrating in such a manner as to be opened to a position of a central portion of the workpiece body 42 which portion is at portion excluding the periphery of the workpiece body 42 is provided in the second mold 30.
  • A first suction device 51 to suck the sheet material 44 is connected to the through holes 32 via a first connection pipe 51 a. A second suction device 52 to suck the workpiece body 42 is connected to the suction holes 22 via a second connection pipe 52 a. A gas supply device 53 that supplies gas such us air is connected to the ejection holes 34 via a third connection pipe 53 a.
  • A bypass 53 b is connected to the first connection pipe 51 a and the third connection pipe 53 a. Allow channel switching valve 54 is provided in a connection portion between the third connection pipe 53 a and the bypass 53 b. The flow channel switching valve 54 is configured to be switchable between two states that are an “ejection-enabled state” in which the gas supply device 53 is connected to the ejection holes 34 via the third connection pipe 53 a and connection between the ejection holes 34 and the first suction device 51 via the bypass 53 b is disconnected, and a “suction-enabled state” in which the first suction device 51 is connected to the ejection holes 34 via the third connection pipe 53 a, the bypass 53 b, and the first connection pipe 51 a and connection between the ejection holes 34 and the gas supply device 53 is disconnected.
  • Also, referring to FIG. 2, in the first mold 20 and the workpiece body 42, a mold side protruding portion 20 a and a workpiece-side protruding portion 42 a protruding toward the second mold 30 are respectively provided in such a manner as to surround the plurality of through holes 32 and to extend along an outer edge of a bonded region of the sheet material 44.
  • When it is assumed that the mold-side protruding portion 20 a and the workpiece-side protruding portion 42 a are not provided, in a case where gas is supplied from the gas supply device 53 to the surface of the sheet material 44 via the ejection holes 34 and the sheet material 44 is peeled off from the second mold 10 in a bonding process of bonding the sheet material 44 to the workpiece body 42, sucking performance of the first suction device 51 with respect to the sheet material 44 is deteriorated when the gas supplied to the surface of the sheet material 44 flows directly to the through holes 32 and is sucked by the first suction device 51.
  • Thus, as described above, the mold-side protruding portion 20 a and the workpiece-side protruding portion 42 a are provided in such a manner as to surround the through holes 32 in the present embodiment, whereby it is possible to suppress or prevent the gas supplied from the gas supply device 53 to the surface of the sheet material 44 from flowing to the through holes 32, and to suppress or prevent deterioration in the sucking performance of the first suction device 51 with respect to the sheet material 44. Note that instead of the mold-side protruding portion 20 a and the workpiece-side protruding portion 42 a, a mold-side protruding portion may be provided in the second mold 30.
  • The stacked workpiece molding device 1 includes a control unit 61 that controls the first suction device 51, the second suction device 52, the gas supply device 53, and the flow channel switching valve 54. The control unit 61 is an electronic control unit including a CPU, a memory, and the like, and controls the first suction device 51, the second suction device 52, the gas supply device 53, and the flow channel switching valve 54 by executing a control program held in a storage unit such as a memory by the CPU and transmitting an instruction signal.
  • Next, a stacked workpiece molding method using the stacked workpiece molding device 1 will be described.
  • First, the first mold 20 and the second mold 30 are brought into an opened state, and the workpiece body 42 is placed on the first mold 20. Then, the sheet material 44 gripped by the clamps 2 is arranged between the workpiece body 42 and the second mold 30. Then, the first mold 20 and the second mold 30 are brought closer to each other and brought into a closed state.
  • Then, the control unit 61 switches the flow channel switching valve 54 to the “suction-enabled state” (state in which the first suction device 51 is connected to the ejection holes 34 via the third connection pipe 53 a, the bypass 53 b, and the first connection pipe 51 a and the connection between the ejection holes 34 and the gas supply device 53 is disconnected), sucks the sheet material 44 with the first suction device 51 via the through holes 32 and the ejection holes 34, and causes the sheet material to be attached to the inner surface of the second mold 30. Thus, the pattern formed in the inner surface of the second mold 30 can be transferred to a surface of the sheet material 44 (transfer process).
  • Then, in a state in which an adhesive is applied to the workpiece body 42 or the sheet material 44, the material 44 is pressed against the workpiece body 42 and is bonded by suction force of the second suction device 52 (bonding process).
  • Here, the sheet material 44 is not bonded to the entire surface of the workpiece body 42, but is bonded only to a portion exposed in assembly of an automobile or the like and is not bonded to a portion such as a periphery hidden by another component in the assembly in order to prevent assembly failure. Only the bonded portion is left and cut, and the non-bonded portion is discarded.
  • Then, in the bonding process, the control unit 61 switches the flow channel switching valve 54 to the “ejection-enabled state” (state in which the gas supply device 53 is connected to the ejection holes 34 via the third connection pipe 53 a and the connection between the ejection holes 34 and the first suction device 51 via the bypass 53 b is disconnected), and supplies gas between the sheet material 44 and the second mold 30 by the gas supply device 53 via the ejection holes 34 in such a manner that the sheet material 44 is peeled off from the second mold 30.
  • Also, with the first suction device 51, the control unit 61 sticks a portion of the sheet material 44, which portion is not bonded to the work piece body 42, to the second mold 30 via the through holes 32.
  • Here, the control unit 61 sets suction force of the first suction device 51 and the second suction device 52 in such a manner that the suction force to suck the sheet material 44 from the through holes 32 becomes stronger than the suction force to suck the workpiece body 42 from the suction holes 22 as indicated by a non-bonded region X in FIG. 4. When the suction force is set in such a manner, the sheet material 44 in the non-bonded portion can be appropriately attracted to the second mold 30.
  • In such a manner, since the non-bonded portion placed in the periphery of the workpiece body 42 is sucked by the first suction device 51 via the through holes 32, it is not necessary to provide a shutter device 100′ that prevents bonding of the sheet material 44 in the periphery of the workpiece body 42 unlike a comparative example illustrated in FIG. 6. Thus, it is not necessary to arrange a clamp outside the shutter device 100 such a manner as to avoid the shutter device 100′ and to prepare a wide sheet material 44, whereby it is possible to reduce an amount of a waste portion of the sheet material 44 and to suppress a manufacturing cost of the stacked workpiece 40.
  • Also, when it is assumed that the mold-side protruding portion 20 a and the workpiece-side protruding portion 42 a are not provided, in a case where gas is supplied from the gas supply device 53 to the surface of the sheet material 44 via the ejection holes 34 and the sheet material 44 is peeled off from the second mold 30 in the bonding process of bonding the sheet material 44 to the workpiece body 42, sucking performance of the first suction device 51 with respect to the sheet material 44 is deteriorated when the gas supplied to the surface of the sheet material 44 flows directly to the through holes 32 and is sucked by the first suction device 51.
  • Thus, as described above, the mold side protruding pardon 20 a and the workpiece-side protruding portion 42 a are provided in such a manner as to surround the through holes 32 in the present embodiment, whereby it is possible to suppress or prevent the gas supplied from the gas supply device 53 to the surface of the sheet material 44 from flowing to the through holes 32, and to suppress or prevent deterioration in the sucking performance of the first suction device 51 with respect to the sheet material 44. Note that instead of the mold-side protruding portion 20 a and the workpiece-side protruding portion 42 a, a mold-side protruding portion may be provided in the second mold 30.
  • According to the stacked workpiece 40 of the present embodiment, as illustrated in FIG. 5, a space between the workpiece-side protruding portion 42 a and the second mold 30 becomes narrow due to the workpiece-side protruding portion 42 a, and a compression portion 44 a sandwiched and thinly crushed between the workpiece-side protruding portion 42 a and the second mold 30 is formed in at least a part of the peripheral portion of the sheet material 44 (portion where the workpiece-side protruding portion 42 a is provided). Thus, according to the stacked workpiece 40 of the present embodiment, the sheet material 44 can be more firmly attached to the workpiece body 42 than in the related art. Note that in the present embodiment, the workpiece-side protruding portion 42 a provided only in a part of the peripheral portion of the workpiece body 42 has been described. However, a workpiece-side protruding portion of the present invention may be provided in an entire peripheral portion of a workpiece body.
  • Also, as illustrated in FIG. 5, in the stacked workpiece 40 of the present embodiment, a protrusion amount of the workpiece-side protruding portion 42 a is set to be smaller than a wall thickness of the sheet material 44. With such a configuration, the workpiece-side protruding portion 42 a is hidden by the sheet material 44 and the surface of the sheet material 44 can be prevent from being raised by the workpiece-side protruding portion 42 a. Thus, appearance of the stacked workpiece 40 can be improved.
  • Note that in the present embodiment, the description has been made by utilization of the workpiece-side protruding portion 42 a having the protrusion amount set to be smaller than the wall thickness of the sheet material 44. However, a stacked workpiece of the present invention is not limited to this, and it is only necessary that a workpiece-side protruding portion and a compression portion are formed. Even when a protrusion amount of a workpiece-side protruding portion is set to be larger than a wall thickness of a sheet material, an effect of the present invention that “a sheet material 44 can be firmly attached to a workpiece body 42” can be acquired by a compression portion.
  • Also, as illustrated in FIG. 7 as another embodiment of the present invention, even when there is no workpiece-side protruding portion 42 a, a compression portion of the present invention can be formed when a gap between a compression forming portion 42 b of a workpiece body 42 and a second mold 30 is set to be smaller than a thickness of a sheet material 44 according to a place where a compression portion of the sheet material 44 is to be formed.
    • REFERENCE SIGNS LIST
    • 1 stacked workpiece molding device
    • 2 clamp
    • 20 first mold
    • 20 a mold-side protruding portion
    • 22 suction hole
    • 30 second mold
    • 32 through hole
    • 34 ejection hole
    • 36 recessed portion
    • 40 stacked workpiece
    • 42 workpiece body
    • 42 a workpiece-side protruding portion
    • 42 b compression forming portion
    • 44 sheet material
    • 44 a compression portion
    • 51 first suction device
    • 51 a first connection pipe
    • 52 second suction device
    • 52 a second connection pipe
    • 53 gas supply device
    • 53 a third connection pipe
    • 53 b bypass
    • 54 flow channel switching valve
    • 61 control unit
    • 71 plate
    • 100′ shutter device
    • X non-bonded region
    • Y bonded region

Claims (2)

1. A stacked workpiece comprising:
a workpiece body; and
a sheet material stacked on the workpiece body, wherein
a compression portion crushed in a thickness direction is formed in at least a part of a peripheral portion of the sheet material.
2. The stacked workpiece according to claim 1, wherein
a workpiece-side protruding portion that protrudes toward a side of the sheet material and that is to form the compression portion is provided in the workpiece body. and
a protrusion amount of the workpiece-side protruding portion is set to be smaller than a thickness of the sheet material.
US17/424,421 2019-01-23 2019-10-30 Stacked workpiece Abandoned US20220088849A1 (en)

Applications Claiming Priority (3)

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JP2019009245 2019-01-23
JP2019-009245 2019-01-23
PCT/JP2019/042642 WO2020152930A1 (en) 2019-01-23 2019-10-30 Stacked workpiece

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JP (1) JP7106684B2 (en)
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WO (1) WO2020152930A1 (en)

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CN113272124A (en) 2021-08-17
JPWO2020152930A1 (en) 2021-10-14
WO2020152930A1 (en) 2020-07-30
CN113272124B (en) 2023-10-03

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